The marine internet of things (MIoT), an increasingly important foundation for ocean
development and protection, consists of a variety of marine distributed sensors under water …

The harmonic balance (HB) method is one of the most commonly used methods for solving
periodic solutions of both weakly and strongly nonlinear dynamical systems. However, it is …

Flutter and limit cycle oscillation (LCO) are important phenomena that need to be considered
in aircraft design. Previous harmonic-balance-based flutter and LCO prediction methods …

Abstract The Unsteady Vortex Lattice Method has interesting capabilities for nonlinear
subsonic aeroelastic analyses. This paper aims to develop an aeroelastic framework based …

Eigenvalue and eigenvectors are essential metrics to characterize dynamic system behavior
and stability. When performing gradient-based design optimization, derivatives of these …

Flutter onset characteristic is an important consideration for transport aircraft design.
Previous work with high fidelity aerostructural optimization has shown a tendency for …

Dynamical systems often exhibit limit cycle oscillations (LCOs), self-sustaining oscillations of
limited amplitude. LCOs can be supercritical or subcritical. The supercritical response is …

View Video Presentation: https://doi. org/10.2514/6.2023-2221. vid Presented is a technique
that significantly improves the computational performance of an existing harmonic balance …

This paper presents a machine learning-based airfoil shape optimization framework
designed to increase flutter resistance and reduce drag. Using the National Advisory …

Presented in this work is a novel and easy-to-implement supplemental-frequency harmonic
balance (SF-HB) approach to efficiently compute dynamically aperiodic systems, which can …